contingent on the economy. and that's been hard to do with qe. and i think the evidence i was alluding to in september suggests how hard that is for us to sort of react to data on a regular basis. i think that's difficult to do and very difficult to communicate. it's easy to say we're data dependent, but it's much harder to say more precisely about how. we haven't been clear about that. i'm beginning to think in september was an example of how hard this is going to be to fine tune, if you will. i'm actually leaning toward the view that, look, qe-2 and qe-1 for that matter. qe-2, we announced a volume of purchases. in that case, it was $600 billion. we said we were going to buy $600 billion and then we're going to stop and see what the economy looks like and then make another assessment. i'm actually leaning to believe maybe that's a better way to get us out of this box of fine tuning and adjusting -- >> by putting a number on it? >> putting a number on the size of the balance sheet or how big this program is going to be and say we're going to --